Lamp-chimney.



P. TBNNANT.

LAMP CHIMNEY. APPLICATION FILED NOV. 25, 1907.

Patented May 3, 1910.

UNITED STATES PATENT OFFICE.

PALMER TENNANT, OF HAGERSTOWN, MARYLAND.

LAIVIP-CHIMNEY.

To all whom it may concern:

Be it known that I, PALMER TENNANT, a citizen of the United States,residing at Hagerstown, in the county of Washington and State ofMaryland, have invented certain new and useful Improvements in Lamp-Chimneys, of which the following is a specification.

This invention relates to lamp chimneys, and the principal object of theinvention is to present a lamp chimney adapted to directly support a panor vessel containing liquid or other material to be heated; said lampchimney being so constructed that a pan, vessel or other object may besupported directly thereupon, without the intervention of a supportingdevice constituting what is generally known as a lamp heater.

Further objects of the invention are to simplify and improve theconstruction and operation of this class of devices.

Vith these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrai'igement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawings has been illustrated a simple and preferredform of the invention; it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theinvention may be resorted to, when desired.

In the drawings-Figure 1 is a perspective view showing a preferred formof the improved lamp chimney in position for operation, and with dottedlines indicating a heating vessel supported upon the chimney. Fig. 2 isa detail side View, showing the upper end of the lamp chimney. Fig. 3 isa vertical sectional View, showing the invention applied to a lampchimney of a slightly different type or pattern. Fig. 4 is a detailview, in side elevation, of the upper end of a lamp chimney,illustrating a slightly modified form of the invention.

Corresponding parts in the several figures are denoted by likecharacters of reference;

The improved lamp chimney, the body of which is indicated by the letterC, may be of the cylindrical shape shown in Figs. 1, 2 and 4t of thedrawings, or it may be of the Specification of Letters Patent.

Application filed November 25, 1907.

Patented May 3, 1910. Serial No. 403,701.

conventional bulging shape illustrated in Fig. 3, or it may be of anyother suitable and convenient shape and structure; the size, proportionsand other details being left entirely to the taste and discretion of themanufacturer. It is to be observed, how ever, that in any case the sidewalls of the chimney adjacent to the upper edge of said chimney are tobe straight, and approximately vertical, as shown at 15 in the severalfigures of the drawings. It will further be observed that the upperextremities of the side walls of the chimney are not bulged,

or extended outward beyond the perimeter of the subjacent portion of thebody of the chimney, or, in other words, that the diameter of the upperend of the chimney does not exceed the diameter of the subjacent, or anyother portion of the said chimney. This is for the purpose of enablingthe chimney to sustain any amount ofweight that may be reasonably placedthereupon, without the least danger of snapping or breaking under thestrain as it would be extremely liable to do if the upper extremity ofthe chimney were lipped or upwardly inclined, as is frequently the case.

The upper end of the lamp chimney is provided with apertures for theescape, in

a lateral direction, of the gases and other products of combustionrising through the flue or chimney; these apertures, or smoke exits, maybe in the nature of rather deep notches, 16, extending'downward from theupper edge of the chimney, as will be seen in Figs. 1, 2 and 3 of thedrawings; or they may be in the nature of apertures of circular or othersuitable shape, as shown at 17 in Fig. 4; the precise shape, formationand location of said apertures being relatively of minor importance,provided that the area, as well as the shape and the general location ofsaid apertures is such that the free escape of the products ofcombustion from the burner of the lamp to which the chimney is appliedwill be encouraged and promoted, even when the upper end of the lampchimney is obstructed by a heating vessel or a similar device placedthereupon. When the smoke exits are in the nature of notches, as 16, theupper extremity of the lamp chimney may be described as being providedwith a plurality of horizontally curved upright or approximatelyvertical lips or lugs, 18, separated by said notches, said lips or lugsbeing, by reason of their peculiar shape, pe-

culiarly fitted to support weight without danger of snapping orbreaking, the upper edges of said lugs being moreover level orapproximately horizontal, so as to form an extended support for aheating vessel, such as a cup, pan or kettle, that may be placedthereon. hen said smoke exits are in the nature of apertures, as 17, itwill be found that the strength of the chimney, as regards its weightsupporting capacity, is practically intact, provided that the portionsof the side walls of the chimney having the said apertures are straightand approximately vertical, as provided for in the foregoingdescription. hen this construction is resorted to, it is obvious thatthe unbroken upper edge of the chimney forms an extended support forsuch heating vessel as may be placed thereon.

Any of the forms of construction herein described and illustrated willbe found conducive to the greatest possible strength and non-liabilityto break or become fractured, which is obviously of the greatesti1nportance in a device ofthis class; and an extended or continuoussupport is provided for the heating vessel which latter will thereforenot be liable to be tilted or upset, causing the contents to be spilled,and endangering the lamp and chimney.

The manner of using the improved lamp chimney, and its advantages, willbe readily understood from the foregoing description taken in connectionwith the drawings hereto annexed.

The chimney is adapted to be used in con nection with any ordinary lampor burner.

consuming oil, as, vapor or other fuel, and it is obvious that theconstruction of the chimney structure proper may be modified accordingto the use for which it is intended; any article that is to be heated,such as a pan or vessel containing liquid, may be placed direct on topof the chimney where it will be subjected to a degree of heat which willspeedily be efiective to raise the temperature of the article.

The improved lamp chimney may be easily manufactured at an expense notnecessarily exceeding the cost of ordinary lamp chimneys; and it isthoroughly eflicient for the purposes for which it is provided. \Vithregard to the smoke exits, or apertures, variously designated 16 and 17,it is desired to be understood that any desired number, from one upward,may be used.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United States:

1. A glass lamp chimney adapted to support a heating vessel said lampchimney being provided at its upper extremity with straight,approximately vertical side Walls indented by notches to form aplurality of horizontally curved upright, approximately vertical lips orlugs with extended horizontal upper edges to firmly support a heatingvessel placed directly thereon.

2. A lamp chimney adapted to directly support a heating vessel upon itsupper extremity, said chimney being formed of approximately equalthickness throughout and the side walls, at the upper end of thechimney, being straight, approximately vertical, disposed within theminor perimeter of any subjacent portion of the chimney, and formed witha level, approximately horizontal upper edge forming an extended supportfor a heating vessel placed thereon; said approximately vertical sidewalls being apertured for the escape laterally of products ofcombustion.

3. A glass lamp chimney adapted to support aheating vessel, the walls ofthe upper portion of said chimney being approximately parallel to itsaxis and formed with apertures for the escape of the products ofcombustion.

In testimony whereof I afiix my signature in presence of two witnesses.

PALMER TENNANT.

Vitnesses A. YINGLING, CHAS. E. BARTHLET.

